Features&colon;1&period; It can control titration endpoint according to preset potential&period;2&period; It can pre-control potential adjustment&period;3&period; It adopts solenoid valve for controlling dropping liquid&period;4&period; It has manual&comma; automatic and constant pH &lpar;potential&rpar; titration modes&period;5&period; It is equipped with delay circuit of titration endpoint&period;6&period; It is suitable for potential titration for laboratory volumetric analysis&period;7&period; It is equipped with JB-1A stirrer